填：circumstance
under no circumstance：短语,指：在任何情况下都不；
under no responsibility无此用法,意思不通啊!If you have not signed a contract, you are under no ___ to pay them any money.A.responsibilityB. liability C. circumstance D. obligation答案DD最佳obligation：n. 1. (道义上或法律上的)义务;责任[(+to)][+to-v]能加你Q吗